<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<style>
    h3{
        height: 80rem;
        line-height: 80rem;
        text-align: center;
        font-size:5rem;
    }
</style>
<body>
    <h3>恭喜你，成功了！^_^</h3>
</body>
</html>